Coefficient of Conservatism:
Coefficient of Wetness:
A European species, occasionally cultivated. Well established at the borders of calcareous mixed forests on a bluff west of St. Ignace (Mackinac Co.) where first collected in 1935.
Sometimes included in H. lachenalii, to which it is very similar except for the conspicuously spotted and streaked leaves.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://michiganflora.net/species.aspx?id=370.